: The source of the file. This stands for "Web Download," meaning it was sourced directly from a streaming service (like Hulu, Netflix, or iTunes) without being re-encoded from a TV broadcast.
: (Likely the end of your snippet) This refers to the video compression codec used to keep the file size manageable while maintaining high quality. Brooklyn.Nine-Nine.S01E12.1080p.WEB-DL.DD5.1.H....
: The audio format, standing for Dolby Digital 5.1 surround sound. : The source of the file
In this specific episode, Doug Judy (played by Craig Robinson) makes his first appearance as the "Pontiac Bandit," starting one of the show's most iconic recurring storylines with Jake Peralta. Brooklyn.Nine-Nine.S01E12.1080p.WEB-DL.DD5.1.H....
: The title of the show. S01E12 : Denotes Season 1, Episode 12 . 1080p : The video resolution (Full High Definition,